MUSKYMAN73

I have a 2004 6.0 kingranch powerstroke turbo it will sit and idle for about 10 min then sounds like it is slowly running out of fuel i have changed my filters allready i also have noticed my pump under the drivers door runs a lot longer than usual and when it stalls the pump is running right away i have also pulled the drain plug on that filter and turned my key on it does not spit any fuel out but is running i have been told to pull off my lines and blow back into the tank incase the screen is plugged can any one help I HAVE HAD MY TRUCK IN FOR A SCAN THE SCAN CAME UP WITH NOTHING WRONG (WHERE DO YOU LOOK NOW) WOULD ANY BODY NOW HOW MUCH PRESURE MY PUMP SHOULD BE PUTTING OUT AND OR HOW MUCH VOLUME IT SHOULD BE PUTTING OUT? I AM SORT OF LOST NOW WITH THE SHOP SCAN SHOWING NO ERRORS THANKS